Backing ring for railcar axle

ABSTRACT

A backing ring assembly for a railcar axle is provided. According to various aspects, the backing ring assembly may include a main body and a ring. The main body may include an inner surface configured to abut a fillet of a railcar axle and a receiving element on an inboard radial face of the main body. The ring may be engaged in the receiving element and may be configured to protrude over a cylindrical surface of a shoulder on the railcar axle. The ring may include an inner face having a recess and a generally flat outer face.

RELATED APPLICATION DATA

This application is a divisional of U.S. patent application Ser. No.14/878,052, filed Oct. 8, 2015, which claims the benefit of priority toU.S. Provisional Patent Application No. 62/061,411, filed Oct. 8, 2014,the disclosures of which are herein incorporated by reference in theirentirety.

FIELD OF THE DISCLOSURE

Aspects generally relate to a roller bearing assembly. Moreparticularly, aspects generally relate to a two-part backing ring usedto back a roller bearing on a railcar axle.

BACKGROUND

Two-part backing rings used to back a roller bearing assembly on arailcar axle are known in the art. In such two-part backing rings, amain body abuts and thus backs (i.e., prevents inboard movement of) aroller bearing assembly used on the railcar axle, and a second piece orlocking ring engages both the main body and a railcar axle in an effortto maintain the main body securely in place.

For example, U.S. Pat. No. 7,219,938 describes a two-part backing ringincluding an annular body (first part) which abuts a fillet of a journalof a railcar axle and which includes a lip extending over the outercylindrical diameter of a dust guard of the railcar axle, and astabilizing element (second part) lodged tightly between the lip anddust guard to lessen motion between the lip and the cylindrical surface.However, such a design provides drawbacks because, among otherdeficiencies, the lip is susceptible to failure (e.g., shearing off)during use as the railcar axle moves with respect to the main body ofthe backing ring.

Other known two-part backing rings eliminate this lip. For example, U.S.Pat. No. 8,226,299 describes a two-part backing ring including anannular body (first part) which abuts the fillet of the journal of therailcar axle but which does not include a lip extending over the outercylindrical diameter of the dust guard of the railcar axle. Rather, theannular body includes a slot on an inboard face of the annular bodywhich receives a locking ring (second part), and this locking ringextends out from the slot and over the dust guard. However, this designalso includes drawbacks because, among other deficiencies, the lockingring includes an outer and an inner groove, providing a weak middleportion of the ring.

SUMMARY

This Summary is provided to introduce a selection of concepts in asimplified form that is further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the invention.

Aspects of the disclosure are directed to a two-part backing ring whichovercomes one or more of the drawbacks associated with the known backingrings discussed above. For example, some embodiments of the disclosureare directed to a two-part backing ring which exhibits improveddurability and backing performance as compared to known two-part backingrings.

According to aspects of the disclosure, a backing ring assembly for arailcar axle is provided. The backing ring assembly may include a mainbody and a ring. The main body may include an inner surface configuredto abut a fillet of the railcar axle and a receiving element on aninboard radial face of the main body. The ring may be engaged in thereceiving element and may be configured to protrude over a cylindricalsurface of a shoulder on the railcar axle. The ring may include an innerface having a recess and a generally flat outer face.

In another embodiment, a railcar axle assembly in provided. The railcaraxle assembly may include a roller bearing assembly and a backing ringassembly. The roller bearing assembly may include a journal having afillet on an outer surface and a shoulder inboard of the journal. Theshoulder may include an outer cylindrical surface, and the fillet mayabut the cylindrical surface. The backing ring may abut the fillet ofthe journal, and may include a main body and an insertable ring. Themain body may have an inner surface abutting the fillet of the journaland a receiving element on an inboard radial face. The insertable ringmay be engaged in the receiving element and may extend over thecylindrical surface of the shoulder. The insertable ring may include aninner face having a recess and a generally flat outer face. Additionalembodiments are described herein.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of the disclosure and the advantagesthereof may be acquired by referring to the following description inconsideration of the accompanying figures, in which like referencenumerals in different figures indicate similar elements, in which thefirst portion of each reference numeral corresponds to the figure numberin which the referenced element is first introduced, and wherein:

FIG. 1 is a sectional view of a backing ring according to an embodimentof the present disclosure.

FIGS. 2-19 are sectional views of backing rings according to otherembodiments of the present disclosure.

DETAILED DESCRIPTION

In the following description of the various embodiments, reference ismade to the accompanying drawings, which form a part hereof, and whichare shown by way of illustration. It is to be understood that otherembodiments may be utilized and structural and functional modificationsmay be made without departing from the scope of the disclosure. Forexample, each of the features identified in FIGS. 1-19 may be utilizedon other embodiments in any combination or subcombination.

In the following figures, portions of the backing ring may notnecessarily be shown to scale. In particular, elements of the main bodyand the ring may be larger or smaller than elements shown in thefollowing figures, without departing from the scope of the presentdisclosure.

FIG. 1 depicts an embodiment of an improved two-part backing ring 10.The backing ring 10 includes an annular body or main body 12 and areplacement part or ring 14 which engages with the main body 12. Wheninstalled on a railcar axle journal 2, the main body 12 abuts a fillet 4which itself abuts cylindrical surface 8 of a dust guard or shoulder 6on the railcar axle journal 2 which, accordingly, prevents inboardmovement of the main body 12 (and thus a bearing assembly, not shown,which abuts an outboard side of the backing ring 10).

The main body 12 may be variously configured. In one embodiment, mainbody 12 may include a slot or receiving element 18 provided on aninboard radial face of the main body 12 for receiving ring 14. Forexample, the receiving element 18 may be a slot (e.g., an annular slot)in the edge of main body 12 cooperating with ring 14 inserted into theslot. The receiving element 18 may also be variously configured as, forexample, a series of holes disposed around main body 12 cooperating withpins disposed on insertable ring 14. Alternatively, main body 12 may beconfigured such that ring 14 is pressed over main body 12. For example,main body 12 may be coplanar with cylindrical surface 8 such that ring14 is simply pressed over a top portion of main body 12.

The main body 12 may include dimples and/or depressions cooperating withdimples and/or depressions on ring 14 to keep it in place. In oneexemplary embodiment, depicted in FIG. 1, the receiving element 18(e.g., slot) of the main body 12 receives ring 14, e.g., in aninterference fit, when the backing ring 10 is installed on the railcaraxle. That is, an outboard end of the insertable ring 14 engages withthe receiving element 18 of the main body 12, and an inboard end of theinsertable ring 14 engages with an outer cylindrical surface 8 (i.e.,shoulder) of the railcar axle, e.g., in an interference fit, when thering 14 is mounted to the railcar axle. As shown in FIG. 1, an overhangformed above the receiving element 18 of the main body 12 is disposedabove the fillet 4 of the railcar axle and does not extend over theshoulder 6 of the railcar axle.

In the embodiment depicted in FIG. 1, the ring 14 includes a radiallyextending portion, i.e. a flange 16 provided on an end (e.g., theinboard end) of the ring 14. In various embodiments, the flange 16 mayextend radially outward, radially inward, may be a series of holes, aseries of nubs, cylindrical portions, bolts, flanges, teeth, and/orother arrangement. Preferably, the flange 16 is configured to make thering 14 more easily removable. The flange 16 may include a curvature tomake the flange more rigid and to prevent the flange from bending. Theflange 16 may be gripped by, e.g., an insertion and/or removal tool toassist in installing and/or removing the ring 14 to the railcar axle.

In embodiments where the flange 16 includes a series of toothedportions, the insertion and/or removal tool may have teeth and/or slotsfor receiving the toothed portions. The tool may then slide over ring 14a between the teeth of flange 16, rotate, and then be used to installand/or remove ring 14 a. In embodiments where the ring 14 includes ahole or slot, the hole or slot may be engaged by an insertion and/orremoval tool (instead of or in addition to the flange 16) duringinstallation and/or removal of the insertable ring 14.

FIG. 2 depicts another embodiment of a two-part backing ring 10 aaccording to aspects of the disclosure. The backing ring 10 a depictedin FIG. 2 is similar to the backing ring 10 depicted in FIG. 1, but inthe embodiment of FIG. 2, an insertable ring 14 a of the backing ring 10a includes a groove 20 provided on an inner face of the insertable ring14 a. Further, a seal 22 may be mounted in the groove 20 and abut theouter cylindrical surface 8 and/or a bottom face of the slot 18. In suchan embodiment, the seal 22 may help prevent water and other debris fromentering the bearing assembly during use. In some embodiments, thebacking ring 14 a may include the groove 20 without anything (e.g., seal22 or otherwise) mounted therein.

FIG. 3 depicts yet another embodiment of a two-part backing ring 10 baccording to aspects of the disclosure. The backing ring 10 b depictedin FIG. 3 is similar to the backing ring 10 depicted in FIG. 1, but inthis embodiment a main body 12 a of the backing ring 10 b includes agroove 24 on a face of the main body 12 a which abuts the fillet 4 ofthe railcar axle. Further, a seal 26 is mounted in the groove 22 andabuts the fillet 4. In such an embodiment, the seal 26 may help preventwater and other debris from entering the bearing assembly during use.

FIG. 4 depicts yet another embodiment of a two-part backing ring 10 caccording to aspects of the disclosure. The backing ring 10 c depictedin FIG. 4 is similar to the backing ring 10 depicted in FIG. 1, but inthis embodiment an insertable ring 14 b does not include the flange 16.Rather, the insertable ring 14 b is generally annular in shape such asan annular cylinder. The insertable ring 14 b may or may not include anoverhang portion 41 (e.g., toothed members, annular inner groove, tabs,or the like) to assist in, for example, a removal operation. Wherepresent, the overhand portion 41 may engage with an insertion and/orremoval tool.

FIG. 5 depicts yet another embodiment of a two-part backing ring 10 daccording to aspects of the disclosure. The backing ring 10 d depictedin FIG. 5 is similar to the backing ring 10 c depicted in FIG. 4, but inthis embodiment the main body 12 b includes the groove 24 with the seal26 mounted therein (as described in connection with FIG. 3, above).Additionally, projections 42 (e.g., cylindrical, square, star, and/orrectangular projections, annular projections such as a ring or toothpattern, and/or depressions of various shapes and sizes) may be utilizedto assist with insertion and/or removal of ring 14 b.

FIG. 6 depicts yet another embodiment of a two-part backing ring 10 caccording to aspects of the disclosure. The backing ring 10 e depictedin FIG. 6 is similar to the backing ring 10 c depicted in FIG. 4, but inthis embodiment an insertable ring 14 c includes the groove 20 (asdescribed in connection with FIG. 2, above). Additionally, a laterallyextending projection 43 (e.g., a bolt, pin, triangle, and/or othermechanical member) may project laterally and have a hold or flange toengage with an insertion and/or removal tool.

FIG. 7 depicts yet another embodiment of a two-part backing ring 10 faccording to aspects of the disclosure. The backing ring 10 f depictedin FIG. 7 is similar to the backing ring 10 c depicted in FIG. 6, but inthis embodiment the seal 22 is provided in the groove 20 of the ring 14c (as described in connection with FIG. 2, above). Additionally,laterally extending member 44 may be a hook, finger, and/or annularmember that is configured for engaging with an insertion and/or removaltool.

FIG. 8 depicts yet another embodiment of a two-part backing ring 10 gaccording to aspects of the disclosure. The backing ring 10 g depictedin FIG. 8 is similar to the backing ring 10 e depicted in FIG. 6, but inthis embodiment main body 12 a includes the groove 26 and seal 24 (asdescribed in connection with FIG. 3, above). It should be appreciatedthat, although not shown, in some embodiments the ring 14 c may includethe seal 22 in the groove 20 (similar to the embodiment shown in FIG. 7)in addition to the main body 12 a including the seal 26 provided in thegroove 24. Further, a laterally inwardly extending depression 45 (e.g.,an angled annular grove, angular depression, angular spaced holes,and/or angular inwardly extending cylinders) may be formed in the outersurface of the ring 14 c. These depressions may cooperate with aninsertion and/or removal tool.

FIG. 9 depicts yet another embodiment of a two-part backing ring 10 haccording to aspects of the disclosure. The backing ring 10 h depictedin FIG. 9 is similar to the backing ring 10 c depicted in FIG. 4, but inthis embodiment an insertable ring 14 d includes a hole 28 extendingfrom an inboard face of the insertable ring 14 d to an outboard face ofthe insertable ring 14 d. The hole 28 may be configured to be engageablewith an insertion and/or removal tool used when mounting and/or removingthe insertable ring 14 d to the railcar axle. For example, in someembodiments the hole 28 may include threads on an inner face thereofwhich are engageable with threaded bolts or the like of the insertionand/or removal tool. Further, the holes 28 may include a slotted flangedportion that locks with an insertion and/or removal tool when, forexample, the tool is rotated. A slot in the upper surface of ring 14 maycooperate with a pin in hole 28 so that an removal tool may pressagainst pins (not shown) in order to remove ring 14 d.

FIG. 10 depicts yet another embodiment of a two-part backing ring 10 iaccording to aspects of the disclosure. The backing ring 10 i depictedin FIG. 10 is similar to the backing ring 10 h depicted in FIG. 9, butin this embodiment an insertable ring 14 e includes a hole 28 a whichonly extends partway into the insertable ring 14 e from an inboard faceof the insertable ring 14 e.

FIG. 11 depicts yet another embodiment of a two-part backing ring 10 jaccording to aspects of the disclosure. The backing ring 10 j depictedin FIG. 11 is similar to the backing ring 10 i depicted in FIG. 10, butin this embodiment a main body 12 c includes an access hole 30 which,when the backing ring 10 j is mounted to the railcar axle, may bealigned with the hole 28 a of the insertable ring 14 e. In suchembodiments, the hole 28 a of the ring 14 e may be formed at the sametime as access hole 30 when the ring 14 e is inserted in the main body12 c and/or hole 28 a may be attached or connected to the hole 30 ofmain body 12 c. Alternatively, the hole 30 may simply be in main body 12c and simply abut against ring 14 e. Where the hole is accessible, thehole may cooperate with a nut, bolt, pin, and/or hydraulic fitting suchthat pressure may be asserted through the hole against the ring 14 e inorder to assist in removal. For example, where the hole 30 is accessiblefrom an outboard side of the main body 12 c by, e.g., an insertionand/or removal tool via the access hole 30 (e.g., the hole 28 a isaccessible such that the a tool can be used to press the insertable ring14 e away from main body 12 c). Ring 14 e may be configured with one ormore (e.g., an annular series) of outwardly extending loops 46 (e.g.,cylindrical loops, annular loops, half pipe loops, and/or otherlaterally extending member with a hole and/or depression). In thismanner, an insertion and/or removal tool may cooperate with the holes inthe extending loops 46.

Although not shown, it should be appreciated that in other suitableembodiments the rings 14 and 14 a-14 i may include, e.g., the groove 20with or without the seal 22 as described in connection with FIGS. 2 and6-8, and may be used in connection with, e.g., the main body 12 aincluding the groove 24 and seal 26 as described in connection with,e.g., FIGS. 3, 5, and 8. It should be further appreciated that theinsertable ring 14, and/or 14 a-14 i could be used in connection withthe main body 12, 12 a-12 c of any other embodiment. For example, themain body 12 c described in connection with FIG. 11 may further includethe groove 24 and seal 26 included in the main body 12 a of FIGS. 3, 5,and 8.

FIG. 12 depicts yet another embodiment of a two-part backing ring 10 kaccording to aspects of the disclosure. The backing ring 10 k depictedin FIG. 12 is similar to the backing ring 10 c depicted in FIG. 4, butin this embodiment an insertable ring 14 f includes an inwardlyextending flange 32 extending from an inboard face of the insertablering 14 f. The flange 32 may include one or more overhangs and/ordepressions 47 for cooperating with an insertion and/or removal tool.Similar to, e.g., the flange 16 discussed in connection with FIG. 1, theflange 32 of the insertable ring 14 f may be gripped by, e.g., aninsertion and/or removal tool, to assist in installing and/or removingthe insertable ring 14 f to the railcar axle.

FIG. 13 depicts yet another embodiment of a two-part backing ring 10 laccording to aspects of the disclosure. The backing ring 10 l depictedin FIG. 13 is similar to the backing ring 10 k depicted in FIG. 12, butin this embodiment an insertable ring 14 g includes the groove 20 andthe seal 22 (as described in connection with FIG. 2, above). It shouldbe appreciated that in other suitable embodiments the insertable ring 14g may include the groove 20 but omit the seal 22. The flange 32 mayinclude one or more overhangs and/or depressions 48 for cooperating withan insertion and/or removal tool.

FIG. 14 depicts yet another embodiment of a two-part backing ring 10 maccording to aspects of the disclosure. The backing ring 10 m depictedin FIG. 14 is similar to the backing ring 10 k depicted in FIG. 12, butin this embodiment the backing ring 10 m includes the main body 12 aincluding the groove 26 and seal 24 (as described in connection withFIG. 3, above). The ring 14 f may also include one or more radialprojections 49, such as bolts or cylinders for assisting in installationand/or removal of the ring 14 f.

FIG. 15 depicts yet another embodiment of a two-part backing ring 10 naccording to aspects of the disclosure. The backing ring 10 n depictedin FIG. 15 is similar to the backing ring 10 c depicted in FIG. 4, butin this embodiment the backing ring 10 n includes an insertable ring 14h having grooves 34 and 50 formed on an outer surface thereof. Althoughin the depicted embodiment the groove 34 faces the main body 12, inother suitable embodiments only a portion or, alternatively, no portionof the groove 34 may face the main body 12. In some embodiments groove50 may be provided more inboard than is depicted in FIG. 15 such that,e.g., only a portion or, alternatively, no portion of the groove 50faces the main body 12. In embodiments of the backing ring 10 n, groove50 may be engaged by an insertion and/or removal tool duringinstallation and/or removal of the insertable ring 14 h.

FIG. 16 depicts yet another embodiment of a two-part backing ring 10 oaccording to aspects of the disclosure. The backing ring 10 o depictedin FIG. 16 is similar to the backing ring 10 n depicted in FIG. 15,including a groove 34 formed on an outer surface of the insertable ring14 h and another groove 51 provided inboard of groove 34, but in thisembodiment a seal 36 is provided in the groove 34 of the insertable ring14 h. As discussed in connection with the other example seals providedherein, the seal 36 may help prevent water and other debris fromentering the bearing assembly during use. The insertable ring 14 h mayalso include a depression (e.g., a annular depression, an annular seriesof holes, an annular series of discrete depressions) for cooperationwith an insertion and/or disassembly tool.

FIG. 17 depicts yet another embodiment of a two-part backing ring 10 paccording to aspects of the disclosure. The backing ring 10 p depictedin FIG. 17 is similar to the backing ring 10 n depicted in FIG. 15, butin this embodiment the backing ring 10 p includes the main body 12 ahaving the groove 24 and seal 26 and discussed more fully in connectionwith FIG. 3. Further, this embodiment includes one or more projections52 from ring 14 h which may include a bolt, cylinder, square, rectangle,ring, and/or other projection that may cooperate with an insertionand/or removal tool.

FIG. 18 depicts yet another embodiment of a two-part backing ring 10 qaccording to aspects of the disclosure. The backing ring 10 q depictedin FIG. 18 is similar to the backing ring 10 b depicted in FIG. 4, butin this embodiment the backing ring 10 q includes an insertable ring 14i including a tooth 38 provided at an outboard end of the insertablering 14 i. The tooth 38 may be engageable with a corresponding tooth ofan insertion and/or removal tool to assist with installing and/orremoving the insertable ring 14 i from a railcar axle. Further, in someembodiments the insertable ring 14 i may have a plurality of teeth(similar to tooth 38) spaced around the circumference of the insertablering 14 i. A series of lateral projections 53 may be used to rotate thering 14 i to engage or disengage the teeth in order to remove and/orinsert the ring 14 i. And as should be well appreciated given thebenefit of this disclosure, in other embodiments the insertable ring 14i may be used with the main body 12 a including the groove 24 and seal26, and/or the insertable ring 14 i may be provided with the groove 20with or without the seal 22 provided therein without departing from thescope of this disclosure.

Finally, FIG. 19 depicts yet another embodiment of a two-part backingring 10 r according to aspects of the disclosure. The backing ring 10 rdepicted in FIG. 18 is similar to the backing ring 10 b depicted in FIG.6, but in this embodiment a groove 20 a is provided on an inner face ofthe ring 14 c and spaces the receiving element 18 of the main body andthe cylindrical surface 8 of the shoulder 6.

The foregoing description is not intended to be exhaustive or to limitembodiments of the present invention to the precise form disclosed, andmodifications and variations are possible in light of the aboveteachings or may be acquired from practice of various embodiments. Theembodiments discussed herein were chosen and described in order toexplain the principles and the nature of various embodiments and theirpractical application to enable one skilled in the art to utilize thepresent invention in various embodiments and with various modificationsas are suited to the particular use contemplated. The features of theembodiments described herein may be combined in all possiblecombinations of methods, apparatuses, modules, systems, andmachine-readable storage memory. Any and all permutations of featuresfrom the above-described embodiments are within the scope of theinvention.

I claim:
 1. A backing ring assembly comprising: a main body including aninner surface configured to abut a fillet of a railcar axle and areceiving element on an inboard axial face; and a ring engaged in thereceiving element and configured to protrude over a cylindrical surfaceof a shoulder on the railcar axle, the shoulder being positioned inboardof the fillet, wherein the ring includes an inner face having an emptyrecess, a flat outer face, and a laterally extending flange on aninboard face of the ring.
 2. A backing ring assembly comprising: a mainbody including an inner surface configured to abut a fillet of a railcaraxle and a receiving element on an inboard axial face; a ring engaged inthe receiving element and configured to protrude over a cylindricalsurface of a shoulder on the railcar axle, the shoulder being positionedinboard of the fillet, wherein the ring includes an inner face having arecess, a flat outer face, and a laterally extending flange on aninboard face of the ring, and wherein, when the backing ring assembly isinstalled on the railcar axle, an inboard-most portion of the main bodyprojects over the fillet of the railcar axle without extending over thecylindrical surface of the shoulder.
 3. The backing ring assembly ofclaim 1, wherein an inboard-most portion of the main body below thereceiving element projects further inboard than an inboard-most portionof the main body above the receiving element.
 4. The backing ringassembly of claim 1, wherein the ring engages in the receiving elementof the main body in an interference fit.
 5. The backing ring assembly ofclaim 1, wherein the laterally extending flange includes one or moreoverhangs and/or depressions.
 6. A railcar axle assembly comprising: aroller bearing assembly including a journal having a fillet on an outersurface and a shoulder inboard of the journal, the shoulder including anouter cylindrical surface, wherein the fillet abuts the cylindricalsurface; and a backing ring abutting the fillet of the journal, thebacking ring including: a main body having an inner surface abutting thefillet of the journal and a receiving element on an inboard axial face;and an insertable ring engaged in the receiving element and extendingover the cylindrical surface of the shoulder, the insertable ringincluding an inner face having an empty recess, a flat outer face, and alaterally extending flange on an inboard face of the insertable ring. 7.A railcar axle assembly comprising: a roller bearing assembly includinga journal having a fillet on an outer surface and a shoulder inboard ofthe journal, the shoulder including an outer cylindrical surface,wherein the fillet abuts the cylindrical surface; a backing ringabutting the fillet of the journal, the backing ring including: a mainbody having an inner surface abutting the fillet of the journal and areceiving element on an inboard axial face; an insertable ring engagedin the receiving element and extending over the cylindrical surface ofthe shoulder, the insertable ring including an inner face having arecess, a flat outer face, and a laterally extending flange on aninboard face of the insertable ring, and wherein an inboard-most portionof the main body projects over the fillet without extending over thecylindrical surface of the shoulder.
 8. The railcar axle assembly ofclaim 6, wherein an inboard-most portion of the main body below thereceiving element projects further inboard than an inboard-most portionof the main body above the receiving element.
 9. The railcar axleassembly of claim 6, wherein the insertable ring engages the receivingelement of the main body and the cylindrical surface of the shoulder inan interference fit.
 10. The railcar axle assembly of claim 6, whereinthe laterally extending flange includes one or more overhangs and/ordepressions.
 11. A backing ring assembly comprising: an annular mainbody configured to abut a fillet of a railcar axle, the annular mainbody including a receiving element on an inboard axial face; and a ringhaving an outboard end engaged in the receiving element, an inboard endconfigured to project over a cylindrical surface of a shoulder of therailcar axle, an inner face having a recess, an outer face without anempty recess, and a laterally extending flange on an inboard face of thering.
 12. A backing ring assembly comprising: an annular main bodyconfigured to abut a fillet of a railcar axle, the annular main bodyincluding a receiving element on an inboard axial face; a ring having anoutboard end engaged in the receiving element, an inboard end configuredto project over a cylindrical surface of a shoulder of the railcar axle,an inner face having a recess, an outer face without a recess, and alaterally extending flange on an inboard face of the ring, and wherein,when the backing ring assembly is installed on the railcar axle, aninboard-most portion of the annular main body projects over the filletof the railcar axle without extending over the cylindrical surface ofthe shoulder.
 13. The backing ring assembly of claim 11, wherein aninboard-most portion of the annular main body below the receivingelement projects further inboard than an inboard-most portion of theannular main body above the receiving element.
 14. The backing ringassembly of claim 11, wherein the ring includes one or more projectionsextending from an inboard portion of the ring.
 15. The backing ringassembly of claim 11, wherein the laterally extending flange includesone or more overhangs and/or depressions.